50.2: <i>Invited Paper</i>: Stroboscopic Effect of LED Lighting

Wang, L Lili; Yan, Tao; Liu, Lu; Perz, Małgorzata; Vogels, Imlc Ingrid; Heynderickx, Ingrid

doi:10.1002/sdtp.10194

Cited by 8 publications

(6 citation statements)

References 7 publications

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“…The mean threshold, expressed as modulation depth, is 0.4 at the lowest illumination level of 5 lux; it decreases to 0.18 at 50 lux, and then increases again to 0.27 at 500 lux. Similar perception experiments have been conducted in a research lab in China [11], and the results were found to be consistent across the labs, indicating that the SVM can be representing a "standard observer".…”

Section: Figuresupporting

confidence: 70%

77‐1: Invited Paper: Modelling Visibility of Temporal Light Artefacts

Perz

Sekulovski

Vogels

et al. 2018

Symp Digest of Tech Papers

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Section: Figuresupporting

confidence: 70%

77‐1: Invited Paper: Modelling Visibility of Temporal Light Artefacts

Perz

Sekulovski

Vogels

et al. 2018

Symp Digest of Tech Papers

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“…One possible concern with our implementation refers to the health issues possibly associated with prolonged exposure to stroboscopic light sources. Indeed, the long‐term effects of exposure to stroboscopic light remain unclear, even at high frequencies . However, we point out that our system is primarily to be used in tandem or integrated with existing imaging devices, such as clinical endoscopy, as described above.…”

Section: Discussionmentioning

confidence: 99%

Real‐time fiber‐based fluorescence lifetime imaging with synchronous external illumination: A new path for clinical translation

Lagarto

Shcheslavskiy

Pavone

et al. 2019

Journal of Biophotonics

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Time‐correlated single photon counting is the “gold‐standard” method for fluorescence lifetime measurements and has demonstrated potential for clinical deployment. However, the translation of the technology into clinic is hindered by the use of ultrasensitive detectors, which make the fluorescence acquisition impractical with bright lighting conditions such as in clinical settings. We address this limitation by interleaving periodic fluorescence detection with synchronous out‐of‐phase externally modulated light source, thus guaranteeing specimen illumination and a fluorescence signal free from bright background light upon temporal separation. Fluorescence lifetime maps are generated in real‐time from single‐point measurements by tracking a reference beam and using the phasor approach. We demonstrate the feasibility and practicality of this technique in a number of biological specimens, including real‐time mapping of degraded articular cartilage. This method is compatible and can be integrated with existing clinical microscopic, endoscopic and robotic modalities, thus offering a new pathway towards label‐free diagnostics and surgical guidance in a number of clinical applications.

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“…A similar disk has been used many times in the previous researches. 23 The speed of 4 m/s is comparable to an upper limit of the speed of hand movements' in a general lighting application, such as an office. Then subjects' feelings are measured by the same visual perception scale.…”

Section: Methodsmentioning

confidence: 99%

“…Subjects can clearly perceive the flicker and the dispersed spatial motion in high-risk zone conditions, which is consistent with the results of a previous paper. 23 It is clear that the stroboscopic effect has an influence on the perception of spatial movement, which will indirectly impact workers' performance, and may even produce potential safety hazards. Besides, workers affected by the office lighting have a poor assessment on the difficulty of the task according to the analysis of work cognition, which supports the conclusion of Nilsson Tengelin et al 28 Generally speaking, the stroboscopic effect causes bad spatial motion evaluations (discrete spatial motion and severe flicker) and work cognition according to the third hypothesis.…”

Section: Figure 14mentioning

confidence: 99%

The effect of stroboscopic effect on human health indicators

Zhao

Hou

Lin

et al. 2019

Lighting Research & Technology

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The stroboscopic effect from LED light sources can become considerable in working environments. Therefore, this study aims to explore the short-term health effect of a temporal light artefact. The experiment was carried out featuring 10 university students. Three frequencies and three modulation depths were assessed. Psychological reaction was evaluated through subjective scales, while physiological parameters were also collected for mutual validation and analysis. It was found that when the conditions are in the high-risk zone defined by IEEE Standard 1789-2015, subjects considered these conditions to be unacceptable and reported discrete spatial movement and higher visual fatigue levels. Supported by psychological and physiological evidence, it is suggested that such fatigue is caused by a higher chance of flicker. Invisible flicker also significantly affected alpha and beta wave power density, suggesting that a strobe of low frequency could potentially decrease drowsiness and increase cortical arousal. Some limitations to the work performance of this study are also discussed.

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50.2: Invited Paper: Stroboscopic Effect of LED Lighting

Abstract: Abstract

Cited by 8 publications

References 7 publications

77‐1: Invited Paper: Modelling Visibility of Temporal Light Artefacts

77‐1: Invited Paper: Modelling Visibility of Temporal Light Artefacts

Real‐time fiber‐based fluorescence lifetime imaging with synchronous external illumination: A new path for clinical translation

The effect of stroboscopic effect on human health indicators

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